在iPhone上使用增加的線寬繪製線條

Question

我在iOS上繪製了一條線條，將一條路徑拖動到CALayer上。我如何用逐漸增大的lineWidth（筆畫寬度）來描邊這條線，以便線的左端比右端更薄？ （它必須是一條線，而不是形狀或閉合路徑，因爲我將使用strokeEnd屬性。）

感謝您的幫助！

Answer 1

使用繪圖功能。起初習慣起來很麻煩，但它的工作。如果您需要更多的幫助，請隨時發表評論

-(void)draw{ 
    float lineHeight = 5;//change this as you see fit, like set it equal to an incrementing/decrementing variable of your choice... 
    glEnable(GL_LINE_SMOOTH); 
    glLineWidth(lineHeight); // change this as you see fit 
    glColor4ub(255,255,255,255); // change these as you see fit :) 
    ccDrawLine(ccp(10,310), ccp(30,310)); // these numbers are probably off, you'll have to mess with these to get it in the right position :) 
     [super draw]; 
     }